Well, my knees and elbows have a higher angle. My skull is shaped as a females.
I guess there some kind of bumpy thing on the back of your head if you male, but I don't have it.
Lastly, my stuff hasn't changed size since I was a teenager (which is pretty small.).
Oh, and my "Adam's apple* never dropped.
Even if I was to be checked, I've been on Estrogen for nearly a year now.